1)"The number of medals received in The Eternal Bastion has been cut to 2, 4, 4 from 2, 4, 8"
this is the best modification, it was enough even this to make the most animated katalam, because for the 2x to bastion, people passed from the base set to the abyss, completely skipping the set battle medal, which caused the emptying of the katalam, and therefore no pvp in it. If you did from the beginning, today you would have seen many more players in set battle medal around and a lot of pvp in the katalam,
2)"Serum in siege"
this change should be eliminated as soon as possible, because the change to bastion is sufficient, while the tempering solution involve the use of all those tricks that in the long run are bad for the game
aion 4,6 you know it well, it's a very balanced patch, that's why you chose it. whatever you change, it risks breaking the balance of the game. So the changes that may seem unimportant, can make other things, or other useless maps, it is an example the double loot of bastion, which had deleted the set battle medal and consequently the pvp in the katalam.
Tips:
Reward players who are more days consecutively online with weekly rewards, eliminate the risk of unbalancing the map, and you will have more people online.
For example: if you donate a tempering solution and one or two enchants 120 to those who log at least once for 1/2 hour a day for a week could be a good solution to encourage players to stay online. But if you do, rewards to account and not to character.
Conclusion:
you can do double reward. For week and for mouth.
Patch 4.6 has been tested for a long time, that's okay. The changes you made with the event are very nice, except for the tempering solution in the siege. If you want to help the players, rewards the most active players with weekly and monthly rewards.
Thanks and bye. I hope you will read my message.
sorry for my bad english